CN1925363A - Method and device for realizing physical random switch-in channel transmission time delay under wide covering - Google Patents
Method and device for realizing physical random switch-in channel transmission time delay under wide covering Download PDFInfo
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Abstract
This invention discloses one realization method covering physical random interface channel time lag, which comprises the following steps: getting real transmission time lag during Node B interface process; using current research area relative transmission time lag message and accuracy to express above real time lag determined by maximum area diameter; Node B sends the transmission time lag into wireless network controller RNC. This invention also discloses one communication device.
Description
Technical field
The present invention relates to the radio network technique of the communications field, relate in particular to the implementation method and the device of physical accidental access information propagation delay time under wide the covering.
Background technology
In the FDD of WCDMA standard, the one way propagation delay time of eating dishes without rice or wine (Transport propogation, Tp, perhaps Propagation Delay) is calculated by the access channel of physics at random (PRACH) among the NodeB, its scope is 0-255, and unit is 3chips (chip).
NodeB is by FP bag (Frame Protocak, Frame Protocol) form sends propagation delay time to radio network controller (RNC), when setting up dedicated channel, RNC can be as required, the propagation delay time Tp value that the PRACH channel is reported is handed down to NodeB, be used to dispose corresponding dedicated channel (during soft handover, RNC does not dispose Tp, and dedicated channel works in no Tp pattern).
By the FP packet format of PRACH channel in the agreement 25.435 as can be known, it is 8bit (Propagation delay) that the propagation delay time of propagation delay time Tp reports bit number, as shown in Figure 1.Obviously, because the span of Tp is 0-255, quantified precision is 3chips, and the maximum radius of corresponding sector can only be 60 kilometers.
Because at the WCDMA networking initial stage, may use big sector and cover, be 180 kilometers sub-district as maximum radius, and the propagation delay time of propagation delay time Tp report bit number and quantified precision to limit the radius of society of the maximum that can represent in the FP packet format.
Summary of the invention
The invention provides a kind of under wide the covering implementation method and the device of physical accidental access information propagation delay time, can't accurately represent the problem that the sub-district covers to solve in the prior art because of what propagation delay time reported that bit number and quantified precision cause.
The invention provides following technical scheme:
A kind of under wide the covering implementation method of Physical Random Access Channel propagation delay time, comprise the steps:
NodeB obtains actual propagation delay time in random access procedure;
Utilize the propagation delay time of current search sub-district correspondence to report bit number and quantified precision to represent the propagation delay time of described reality, this quantified precision and propagation delay time report bit number to determine according to the radius of society of maximum, after making described quantified precision quantize propagation delay time, corresponding propagation delay time reports bit number can represent maximum radius of society;
Propagation delay time after NodeB will quantize is sent to radio network controller (RNC).
Wherein, described quantified precision and propagation delay time report bit number according to the definite detailed process of the radius of society of maximum to be:
When reporting bit number to be appointed as fixed value described propagation delay time, determine the value of described quantified precision according to the radius of society of described maximum.
In addition, described quantified precision and propagation delay time report bit number according to the definite detailed process of the radius of society of maximum can also be:
When described quantified precision is appointed as fixed value, specify described propagation delay time to report bit number according to the radius of society of described maximum.
Further, determine described quantified precision according to the radius of described sub-district maximum and the ratio of N, wherein, N reports bit number to determine according to propagation delay time.
Wherein, when utilizing quantification accuracy quantification propagation delay time, adopt the propagation delay time that rounds after obtaining quantizing downwards.
Further, this method also comprises step:
NodeB utilizes the quantified precision identical with quantizing described transmission to recover the propagation delay time of reality after receiving the propagation delay time that RNC issues.
Wherein, the described NodeB process of obtaining actual propagation delay time is specially:
The effective diameter phase place that NodeB inserts the user according to the sub-district that obtains obtains actual propagation delay time, and described effective diameter phase place is an effective diameter phase place minimum in the multipath; Perhaps described effective diameter phase place is an effective diameter phase place the strongest in the multipath.
Wherein, when described propagation delay time reported bit number to be 8 bits, maximum radius of society was by 60 kilometers, 120 kilometers and 180 kilometers divisions; With the radius of society of maximum is that the quantified precision of 60 kilometers sub-district is configured to 3 chips, is that the quantified precision of 120 kilometers sub-district is configured to 6 chips with the radius of society of maximum, is that the quantified precision of 180 kilometers sub-district is configured to 9 chips with the radius of society of maximum.
In addition, when described quantified precision is 3 chips, represent 240 kilometers sub-district for radius, propagation delay time reports bit number to be set to 10.
The present invention also provides a kind of communication equipment, comprising:
Be used for public access channel module according to the access user effective diameter phase calculation actual transmissions time delay of obtaining;
Be used to obtain quantified precision and corresponding propagation delay time reports bit number, and the quantization modules of utilizing this quantified precision that the actual transmissions time delay is quantized, described quantified precision and described propagation delay time report bit number to determine according to the radius of society according to maximum;
Be used to receive the dedicated channel module of propagation delay time;
Be used to utilize quantified precision and the corresponding propagation delay time identical to report bit number to recover the recovery module of propagation delay time with quantization modules quantification actual transmissions time delay.
Wherein, when described largest cell radius was 60 kilometers, it was 8 bits that described given transmission time delay reports bit number.
Wherein, the propagation delay time that rounds after obtaining quantizing is adopted in the time-delay when quantizing actual transmissions of described quantization modules downwards.
Described quantization modules is included in the described public access information module; Perhaps described recovery module is included in the described dedicated channel module.
The present invention has following beneficial effect:
1, the present invention can adopt corresponding quantization accuracy quantification propagation delay time according to the radius of society of maximum, makes propagation delay time can satisfy transmission requirement.
2, adopting the present invention can be on the basis that not change existing FP packet format, satisfy the application that the networking initial stage builds big sector, be 60 kilometers, 180 kilometers etc. as the minor radius of maximum.
2, can not change existing FP packet format owing to after changing at radius of society, thereby the present invention can make NodeB dock with the different networks controller.
Description of drawings
Fig. 1 is a RACH data FP packet format schematic diagram in the prior art;
Fig. 2 is the schematic diagram that NodeB docks with radio network controller;
Fig. 3 is the journey figure that realizes propagation delay time stream in one embodiment of the present of invention;
Fig. 4 is a flow chart of realizing propagation delay time in an alternative embodiment of the invention;
Fig. 5 is a kind of FP packet format schematic diagram in the embodiment of the invention;
Fig. 6 is a NodeB structural representation in the embodiment of the invention.
Embodiment
Consult shown in Figure 2, press the existing protocol regulation, common signal channel module among the NodeB is after calculating propagation delay time Tp, be reported to radio network controller (RNC) by the FP form, RNC also is indifferent to actual propagation delay time Tp, only when setting up specific information it is handed down to NodeB, the dedicated channel module among the NodeB is utilized propagation delay time configure dedicated channel.
Because may use big sectors/cells at the WCDMA networking initial stage covers, as, maximum radius is 180 kilometers sub-district, in order to satisfy this demand, the present invention reports bit number by quantified precision (or title " unit precision ") or the propagation delay time that changes propagation delay time Tp, satisfies the practical application that big sector covers.
Because for the sub-district of radius greater than 60 kilometers, the actual transmissions time delay of its Physical Random Access Channel may be far longer than 765chips (chip), as at 120 kilometers places, (120*1000/78.125 1chip=78.125 rice)=1536chips, the value 512 (1536/3) after this moment, actual propagation delay time quantized with quantified precision 3 can not be represented with 8 bits (Bit).Therefore, the present invention is identified for quantizing the quantified precision of actual propagation delay time by report bit number according to the radius of society of maximum and propagation delay time, makes the value after the quantification still can adopt specific number of bits to represent; And NodeB utilizes quantified precision recovery propagation delay time and the configure dedicated channel identical with quantizing the actual transmissions time delay after receiving the propagation delay time that RNC issues.
Under the NodeB a plurality of sub-districts are arranged, can report bit number to be identified for quantizing being pre-configured among the NodeB behind the quantified precision of actual transmissions time delay according to each maximum radius of society or maximum search scope and propagation delay time, when needs quantize the actual transmissions time delay, according to the current search cell queries to the corresponding quantitative precision.
For more flexible on handling, when needs quantize the actual transmissions time delay, determine that according to the maximum search scope of current search sub-district quantified precision or propagation delay time report bit number, like this when propagation delay time reports bit number to be fixed value, quantified precision also can automatically change thereupon after reconfiguring the maximum search scope of sub-district, in like manner as can be known, when the quantification precision was fixed value, described propagation delay time reported the value of bit number also to change automatically after reconfiguring the maximum search scope of sub-district.A kind of preferable mode is to determine quantified precision by " sub-district maximum search scope/N ", wherein N represents that according to being used to the propagation delay time of time delay reports bit number to determine, when reporting bit number to be 8 bits when propagation delay time, promptly represent propagation delay time TP with 8 bits, N=2^8-1=255 then, by that analogy.The specific implementation process of the different values of N will be described in detail in conjunction with Fig. 5 and Fig. 6 hereinafter.
Consult shown in Figure 3ly, represent propagation delay time by existing 8 bits, the present invention realizes the key step of accidental channel propagation delay time following (to determine that dynamically quantified precision is an example):
Common signal channel module among step 100, the NodeB is obtained the minimum effective diameter phase place that inserts the user from the multipath that searches.
When calculating actual propagation delay time, also can adopt effective diameter phase place the strongest in the multipath.
Propagation delay time after step 140, common signal channel module will quantize writes in the FP bag, and the FP bag is sent to RNC.
Dedicated channel module among step 170, the NodeB is obtained propagation delay time, according to the maximum search scope of current area, calculate quantified precision by " sub-district maximum search scope/256 ", then, press: Tp ' * quantified precision, recover actual propagation delay time and configure dedicated channel.
According to existing TP packet format, a kind of preferable mode is that by 60 kilometers, 120 kilometers and 180 kilometers radius of societies of dividing maximum, the corresponding quantitative precision is as follows respectively:
When the radius of society of A, maximum is 60KM, the maximum (the in fact also one way hunting zone of respective cell) of actual propagation delay time Tp is 60*1000/78.125 (1chip=78.125 rice)=768chips, represent propagation delay time with 8Bit, then quantified precision is 3 (promptly 768/256); Promptly the transmission maximum 768chips of this sub-district represents with value 255 in the FP bag with 3 amount thenizations.
B, when maximum radius of society is 120KM, the maximum of actual propagation delay time Tp is 1536chips, represents propagation delay time with 8Bit, then quantified precision is 6 (promptly 1536/256); Promptly the transmission maximum 1536chips of this sub-district represents with value 255 in the FP bag with 6 amount thenizations.
C, when maximum radius of society is 180KM, the maximum of actual propagation delay time Tp is 2304chips, represents propagation delay time with 8Bit, then quantified precision is 9 (promptly 2304/256); Promptly the transmission maximum 2304chips of this sub-district is with 9 amount thenizations, with representing with value 255 in the FP bag.
The algorithm of the propagation delay time after therefore, the calculating of common signal channel module quantizes is as follows:
(1) Tp=successfully insert user's phase place minimum the effective diameter phase place/(4*3*2), radius of society is smaller or equal to 60 kilometers, unit is 3Chips;
(2) Tp=successfully inserts the effective diameter phase place of user's phase place minimum/(4*6*2), radius of society greater than 60 kilometers smaller or equal to 120 kilometers, unit is 6Chips;
(3) Tp=successfully inserts the effective diameter phase place of user's phase place minimum/(4*9*2), radius of society greater than 120 kilometers smaller or equal to 180 kilometers, unit is 9Chips.
Wherein, 4 in the denominator is because the precision of effective diameter phase place is 1/4 to introduce; The 2nd, because comprising trip path, the Tp value introduces (in the WCDMA system, up timing is based on descending timing); 3,6,9 is because quantified precision is introduced.
Can find out that from the propagation delay time of calculating after quantizing in flow process shown in Figure 3, calculating quantified precision before or after calculating the actual transmissions time delay does not all influence realization of the present invention.
Maximum radius of society can be divided according to actual needs, be not limited to above-mentioned 60 kilometers, 120 kilometers and 180 kilometers dividing mode, accordingly, its corresponding quantitative precision also can be determined flexibly according to actual conditions, as long as can satisfy the requirement of transformat.
No matter be access channel or dedicated channel, search all is to realize in certain search window.The position of search window, except depending on the channel basic parameter, an important parameters is exactly propagation delay time Tp, therefore, Tp can only can not (have certain width because of search window, if Tp is big, before actual multipath may drop on search window greatly for a short time, and Tp is a little bit smaller, and multipath generally still can be in window).In view of this, the present invention is when quantizing actual transmissions time delay Tp, and what algorithm was taked is the method that rounds downwards, and for example: the sub-district distance is 180KM, the Tp=2015 that common signal channel module Practical Calculation among the NodeB obtains, the TP value after then quantizing is 2015/9=223 (actual is 223.89).
What take is that the method that rounds downwards quantizes under the situation of actual transmissions time delay, the actual transmissions time delay Tp that dedicated channel module among the NodeB calculates then is 223*9=2007 (common signal channel is actual before quantification to be 2015Chips, therefore actual differed from 8 Chips); Because the timing relationship of dedicated channel module is based on descending; just the position of its search window is based on 2 times Tp value; like this; the error of introducing is under the 180KM situation; maximum possible is 9*2=18Chips, therefore, and for the search window computing module of dedicated channel module; also need special processing in principle, for example window shifts to an earlier date 20Chips (as boundary belt).In the practical application, the emission when switching owing to consideration UE is situation regularly, and the dedicated channel module of NodeB side has been considered the search window reach, so can consider no longer separately.
One of method of aforementioned definite quantified precision is to determine quantified precision by " sub-district maximum search scope/N ", and wherein N is according to being used to represent that propagation delay time reports bit number to determine.Obviously, by this method further as can be known: if under the situation that quantified precision is determined, can change by the bit number of N equally, come corresponding different sub-district maximum search scopes.With present agreement (25.435) is example, the quantified precision of Tp is 3chip, suppose that it is maintained fixed, if then N gets 8 bits, then the maximum search scope of denotable sub-district is 60km, if N gets 9 bits, then the maximum search scope of denotable sub-district is 120km, if N gets 10 bits, then the maximum search scope of denotable sub-district is that the big sectors/cells of 240km covers, by that analogy.
Consult shown in Figure 4ly, be fixed as 3chip, when N gets 10 bits, realize that then the key step of accidental channel propagation delay time is as follows when quantizing precision:
Common signal channel module among step 200, the NodeB is obtained the minimum effective diameter phase place that inserts the user from the multipath that searches.
Step 210, common signal channel module are according to described minimum effective diameter phase place, by formula: the minimum effective diameter of Tp=/(K*2) calculates actual propagation delay time.Wherein, 1/K is the precision of effective diameter phase place, the 2nd, because comprising trip path, the Tp value introduces (in the WCDMA system, up timing is based on descending timing).
When calculating actual propagation delay time, also can adopt effective diameter phase place the strongest in the multipath.
Step 220, utilize quantified precision (being fixed as 3chip) to quantize described actual transmissions time delay, its quantitative formula is: Tp '=Tp/ quantified precision.
Propagation delay time after step 230, common signal channel module will quantize writes in the FP bag, and the FP bag is sent to RNC.TP represents that with 10 bits a kind of possible FP packet format as shown in Figure 5.
Step 240, RNC obtain and preserve propagation delay time Tp ' from the FP bag.
Step 250, when setting up dedicated channel, RNC issues propagation delay time Tp ' to NodeB.
Dedicated channel module among step 260, the NodeB is obtained propagation delay time, presses: Tp ' * quantified precision, recover actual propagation delay time and configure dedicated channel.
Correspondingly, as shown in Figure 6, the NodeB 50 of preferred construction comprises common signal channel module 500 and dedicated channel module 501 among the present invention, and described common signal channel module 500 comprises quantization modules 5000, and described dedicated channel module 501 comprises recovers module 5010.Wherein:
Common signal channel module 500 is used for calculating actual propagation delay time according to the effective diameter phase meter that successfully inserts the user.
Recover module 5010, be used for determining that according to the maximum search scope of current area corresponding quantitative precision and propagation delay time report bit number, and the propagation delay time that reports bit number that RNC is issued with this quantified precision and corresponding propagation delay time reverts to actual propagation delay time, the propagation delay time configure dedicated channel that described dedicated channel module 501 is utilized after recovering.
In the present invention, quantization modules 5000 and recovery module 5010 can be distinguished independent setting in NodeB, and quantization modules 5000 logically establishes a connection with dedicated channel module 501 and gets final product with common signal channel module 500, recovery module 5010.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1, a kind of under wide the covering implementation method of Physical Random Access Channel propagation delay time, it is characterized in that, comprise the steps:
NodeB obtains actual propagation delay time in random access procedure;
Utilize the propagation delay time of current search sub-district correspondence to report bit number and quantified precision to represent the propagation delay time of described reality, this quantified precision and propagation delay time report bit number to determine according to the radius of society of maximum, after making described quantified precision quantize propagation delay time, corresponding propagation delay time reports bit number can represent maximum radius of society;
Propagation delay time after NodeB will quantize is sent to radio network controller (RNC).
2, method according to claim 1 is characterized in that, the detailed process that described quantified precision and propagation delay time report bit number to determine according to the radius of society of maximum is:
When reporting bit number to be appointed as fixed value described propagation delay time, determine the value of described quantified precision according to the radius of society of described maximum.
3, method according to claim 1 is characterized in that the detailed process that described quantified precision and propagation delay time report bit number to determine according to the radius of society of maximum is:
When described quantified precision is appointed as fixed value, specify described propagation delay time to report bit number according to the radius of society of described maximum.
4, as claim 2 or 3 described methods, it is characterized in that, determine described quantified precision according to the radius of described sub-district maximum and the ratio of N, wherein, N reports bit number to determine according to propagation delay time.
5, method as claimed in claim 4 is characterized in that, when utilizing quantification accuracy quantification propagation delay time, adopts the propagation delay time that rounds after obtaining quantizing downwards.
6, method as claimed in claim 5 is characterized in that, this method also comprises step:
NodeB utilizes the quantified precision identical with quantizing described transmission to recover the propagation delay time of reality after receiving the propagation delay time that RNC issues.
7, method as claimed in claim 5 is characterized in that, the process that described NodeB obtains actual propagation delay time is:
The effective diameter phase place that NodeB inserts the user according to the sub-district that obtains obtains actual propagation delay time, and described effective diameter phase place is an effective diameter phase place minimum in the multipath; Perhaps
Described effective diameter phase place is an effective diameter phase place the strongest in the multipath.
8, method as claimed in claim 5 is characterized in that, when described propagation delay time reported bit number to be 8 bits, maximum radius of society was by 60 kilometers, 120 kilometers and 180 kilometers divisions; With the radius of society of maximum is that the quantified precision of 60 kilometers sub-district is configured to 3 chips, is that the quantified precision of 120 kilometers sub-district is configured to 6 chips with the radius of society of maximum, is that the quantified precision of 180 kilometers sub-district is configured to 9 chips with the radius of society of maximum.
9, method as claimed in claim 5 is characterized in that, when described quantified precision is 3 chips, is 240 kilometers sub-district in order to represent radius, and propagation delay time reports bit number to be set to 10.
10, a kind of communication equipment is characterized in that, comprising:
Be used for public access channel module according to the access user effective diameter phase calculation actual transmissions time delay of obtaining;
Be used to obtain quantified precision and corresponding propagation delay time reports bit number, and the quantization modules of utilizing this quantified precision that the actual transmissions time delay is quantized, described quantified precision and described propagation delay time report bit number to determine according to the radius of society according to maximum;
Be used to receive the dedicated channel module of propagation delay time;
Be used to utilize quantified precision identical and corresponding propagation delay time to report bit number to recover the recovery module of propagation delay time with quantization modules quantification actual transmissions time delay.
11, communication equipment as claimed in claim 10 is characterized in that, described largest cell radius is 60 kilometers, and it is 8 bits that the propagation delay time of described appointment reports bit number.
12, communication equipment as claimed in claim 10 is characterized in that, the propagation delay time that rounds after obtaining quantizing is adopted in the time-delay when quantizing actual transmissions of described quantization modules downwards.
As claim 10,11 or 12 described communication equipments, it is characterized in that 13, described quantization modules is included in the described public access information module; Perhaps
Described recovery module is included in the described dedicated channel module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100994281A CN1925363B (en) | 2005-08-31 | 2006-07-18 | Method and device for realizing physical random switch-in channel transmission time delay under wide covering |
| PCT/CN2007/002163 WO2008011800A1 (en) | 2006-07-18 | 2007-07-16 | A method and equipment for realizing propagation delay of a physical random access channel in a wide coverage |
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| CN200510093910.X | 2005-08-31 | ||
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| CN2006100994281A CN1925363B (en) | 2005-08-31 | 2006-07-18 | Method and device for realizing physical random switch-in channel transmission time delay under wide covering |
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| CN1925363B CN1925363B (en) | 2011-04-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008011800A1 (en) * | 2006-07-18 | 2008-01-31 | Huawei Technologies Co., Ltd. | A method and equipment for realizing propagation delay of a physical random access channel in a wide coverage |
| CN101378279B (en) * | 2007-08-28 | 2012-07-04 | 中兴通讯股份有限公司 | Method and apparatus for obtaining propagation delay from physical stochastic access channel |
| WO2014113967A1 (en) * | 2013-01-25 | 2014-07-31 | 华为技术有限公司 | Propagation delay processing method, apparatus, and device |
| WO2015168880A1 (en) * | 2014-05-07 | 2015-11-12 | 华为技术有限公司 | Propagation delay processing method, apparatus, and device thereof |
| CN108882248A (en) * | 2017-05-16 | 2018-11-23 | 西安电子科技大学 | LTE extra long distance user's accidental access method based on sector mark |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19916063C1 (en) * | 1999-04-09 | 2000-07-13 | Siemens Ag | Synchronising method for radio communication system |
| US6633559B1 (en) * | 1999-08-11 | 2003-10-14 | Ericsson Inc. | Apparatus and methods for extended base station range using staggered uplink frame structures |
| US7336616B2 (en) * | 2000-12-11 | 2008-02-26 | Nokia Corporation | Configuring a data transmission interface in a communication network |
| DE60212971T2 (en) * | 2002-10-15 | 2007-03-01 | Lucent Technologies Inc. | Method for selecting cells of base stations for a soft handover connection, and a network for mobile transmission systems |
| GB0225903D0 (en) * | 2002-11-07 | 2002-12-11 | Siemens Ag | Method for uplink access transmissions in a radio communication system |
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2006
- 2006-07-18 CN CN2006100994281A patent/CN1925363B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008011800A1 (en) * | 2006-07-18 | 2008-01-31 | Huawei Technologies Co., Ltd. | A method and equipment for realizing propagation delay of a physical random access channel in a wide coverage |
| CN101378279B (en) * | 2007-08-28 | 2012-07-04 | 中兴通讯股份有限公司 | Method and apparatus for obtaining propagation delay from physical stochastic access channel |
| WO2014113967A1 (en) * | 2013-01-25 | 2014-07-31 | 华为技术有限公司 | Propagation delay processing method, apparatus, and device |
| CN104205982A (en) * | 2013-01-25 | 2014-12-10 | 华为技术有限公司 | Propagation delay processing method, apparatus, and device |
| CN104205982B (en) * | 2013-01-25 | 2018-05-25 | 华为技术有限公司 | Propagation delay time processing method and its device and equipment |
| WO2015168880A1 (en) * | 2014-05-07 | 2015-11-12 | 华为技术有限公司 | Propagation delay processing method, apparatus, and device thereof |
| CN108882248A (en) * | 2017-05-16 | 2018-11-23 | 西安电子科技大学 | LTE extra long distance user's accidental access method based on sector mark |
| CN108882248B (en) * | 2017-05-16 | 2021-05-18 | 西安电子科技大学 | LTE (Long term evolution) ultra-long distance user random access method based on sector identification |
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Application publication date: 20070307 Assignee: APPLE Inc. Assignor: HUAWEI TECHNOLOGIES Co.,Ltd. Contract record no.: 2015990000755 Denomination of invention: Method and device for realizing physical random switch-in channel transmission time delay under wide covering Granted publication date: 20110413 License type: Common License Record date: 20150827 |
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